Are you also the type of person who, in this age of
information overload, tucks tidbits of interest into the files of your brain,
intending to follow up on them later?
Only to forget until something occurs to jostle the memory files? Maybe I need a
brain more like that of the chickadee, expanding and contracting and adapting
as needed by the season.
So the black-capped chickadees (Poecile atricapillus) are back at
the feeders, and so is my memory of reading something extraordinary about the chickadee brain last year and wanting to investigate. Of all the wild birds that visit,
the chickadees seem to be the most fearless and friendly. In fact, they’re often the only ones that
aren’t afraid to approach even after I’ve appeared on the deck, pointing a
camera at them. Frustratingly, they are
also among the quickest and most reluctant to pose.
Research done by Professor Colin Saldanha, now at American
University, showed that the chickadee’s brain can grow up to 30% larger during
times when they need to find food for storage.
The brain is expanding, adding new nerve cells, in order to help them remember the hundreds
of hiding places where they’ve stored the food.
Then, in the spring, the brain shrinks back to normal size, when their
memories are needed less.
Another study, done by Vladamir Pradosudov at University of
Nevada in Reno showed that when birds live in harsher conditions, such as
Alaska, they not only find more food than those in milder climates, but they’re
better at finding their caches, have better spatial memories, and have larger
brains than the same species in Colorado.
Wishing you an open-minded, peaceful and rejuvenating New
Year.






















